42 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Cumberland | 1 | 18,569 | 19,024 | -0.49% | 1,847 | 10 | City |
| Frostburg | 2 | 6,929 | 7,013 | -0.24% | 2,072 | 3 | City |
| Cresaptown | 3 | 4,784 | 5,584 | 0.25% | 1,800 | 3 | CDP |
| La Vale | 4 | 4,551 | 4,486 | 1.49% | 499 | 9 | CDP |
| Westernport | 5 | 1,757 | 1,807 | -0.57% | 1,999 | 1 | Town |
| Bowling Green | 6 | 1,108 | 1,289 | 0.18% | 1,149 | 1 | CDP |
| Lonaconing | 7 | 976 | 996 | -0.41% | 2,696 | 0 | Town |
| Finzel | 8 | 788 | 869 | 2.07% | 200 | 4 | CDP |
| Corriganville | 9 | 783 | 619 | 2.89% | 2,169 | 0 | CDP |
| Bowmans Addition | 10 | 706 | 669 | 0.86% | 630 | 1 | CDP |
| Danville | 11 | 678 | 526 | 4.15% | 594 | 1 | CDP |
| Potomac Park | 12 | 588 | 718 | -17.99% | 1,523 | 0 | CDP |
| Ellerslie | 13 | 576 | 629 | 0% | 624 | 1 | CDP |
| Mount Savage | 14 | 509 | 768 | -4.68% | 531 | 1 | CDP |
| Midland | 15 | 472 | 486 | -0.63% | 2,987 | 0 | Town |
| Barton | 16 | 454 | 464 | -0.44% | 2,193 | 0 | Town |
| Gilmore | 17 | 417 | 308 | 4.77% | 4,010 | 0 | CDP |
| Eckhart Mines | 18 | 410 | 512 | -7.66% | 269 | 2 | CDP |
| Rawlings | 19 | 374 | 370 | -5.56% | 419 | 1 | CDP |
| Grahamtown | 20 | 315 | 211 | -0.94% | 2,059 | 0 | CDP |
| Midlothian | 21 | 311 | 385 | -0.32% | 449 | 1 | CDP |
| Zihlman | 22 | 305 | 347 | -0.97% | 202 | 2 | CDP |
| Shaft | 23 | 292 | 291 | 1.04% | 372 | 1 | CDP |
| Pleasant Grove | 24 | 270 | 339 | -2.17% | 169 | 2 | CDP |
| McCoole | 25 | 265 | 515 | -5.69% | 189 | 1 | CDP |
| Klondike | 26 | 255 | 157 | 3.66% | 651 | 0 | CDP |
| Moscow | 27 | 226 | 325 | -0.44% | 922 | 0 | CDP |
| Bier | 28 | 224 | 224 | 1.36% | 154 | 1 | CDP |
| Flintstone | 29 | 184 | 198 | 0% | 452 | 0 | CDP |
| Franklin | 30 | 135 | 157 | -6.9% | 489 | 0 | CDP |
| Detmold | 31 | 124 | 256 | 6.9% | 795 | 0 | CDP |
| Oldtown | 32 | 109 | 30 | 6.86% | 294 | 0 | CDP |
| Vale Summit | 33 | 97 | 137 | -2.02% | 98 | 1 | CDP |
| Barrelville | 34 | 80 | 44 | 6.67% | 1,818 | 0 | CDP |
| Little Orleans | 35 | 80 | 54 | 6.67% | 64 | 1 | CDP |
| Luke | 36 | 80 | 84 | -1.23% | 301 | 0 | Town |
| Dawson | 37 | 52 | 52 | -5.45% | 85 | 1 | CDP |
| Spring Gap | 38 | 52 | 38 | 6.12% | 80 | 1 | CDP |
| National | 39 | 31 | 62 | 6.9% | 197 | 0 | CDP |
| Carlos | 40 | 27 | 58 | -22.86% | 94 | 0 | CDP |
| Woodland | 41 | 24 | 31 | -20% | 122 | 0 | CDP |
| Clarysville | 42 | 16 | 40 | 6.67% | 137 | 0 | CDP |
Cumberland is the largest city in Allegany County, with a population of 18,569.
Clarysville is the smallest city in Allegany County, with a population of 16.
There are 42 cities in Allegany County, Maryland.